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Flashcards in Forearm Deck (37):
1

Most important ligaments of radioulnar joint?

Volar ligaments

2

Triangular fibrocartilage complex components?

1) dorsal and volar radioulnar ligament
2) articular disc
3) prestyloid process
4) meniscus homolog
5) ulnar collateral ligament

3

What joint is Listers tubercle level with?

Scapholunate joint

4

Tennis elbow, primary muscle involved?

ECRB

5

Radial nerve runs bt which 2 muscles above the elbow?

Brachialis and brachioradialis

6

PIN splits what muscle?

Supinator

7

PIN supplies all extensors EXCEPT?

Mobile wad:
1) brachioradialis
2) ECRB
3) ECRL

8

The superficial branch of radial n passes to the dorsal radial surface of hand in the distal 1/3 of the forearm by passing bt which 2 muscles?

Brachioradialis (deep to) and ECRL

9

Median n superficial to which muscle at the elbow?

Brachialis

10

Median n splits what muscle?

The 2 heads of the pronator teres

11

Median n runs bt which 2 muscles in the forearm?

FDS and FDP

12

Median supplies all flexors EXCEPT?

FCU

13

AIN runs bt which 2 muscles?

FPL and FDP

14

AIN supplies what?

All deep flexors EXCEPT the ulnar half of FDP

15

Where does the ulnar n enter the forearm?

Between 2 heads of FCU

16

Ulnar n runs bt what 2 muscles in forearm?

FCU and FDP

17

Where does ulnar n enter the hand?

Guyon's canal

18

Lateral antebrachial cutaneous n passes lateral to what vein and emerges laterally bt what 2 muscles at the elbow?

1) Cephalic vein
2) biceps and brachialis

19

Posterior antebrachial cutaneous n a branch of what n?

Radial

20

Which muscle is the last to return to function after PIN compression?

The most distally innervated (extensor indicis proprius)

21

PIN innervations?

1) supinator
2) extensor carpi ulnaris
3) extensor digitorum
4) extensor digiti minimi
5) APL
6) EPL
7) EPB
8) extensor indicis proprius

22

Cubital fossa borders?

1) 2 epicondyles
2) brachioradialis
3) pronator teres
4) overlies the brachialis and supinator

23

Radial artery runs on what muscle?

Pronator teres

24

Radial artery is deep to what muscle?

Brachioradialis

25

Proximally, the ulnar a is covered by what muscles?

Superficial flexors (bt FDS and FDP)

26

Distally, the ulnar a lies on what muscle?

FDP (bt tendons of FCU and FDS)

27

Forearm branches of the ulnar artery?

1) anterior and posterior recurrent ulnar
2) common interosseous
3) muscular and nutrient arteries

28

Approaches to the forearm?

1) Anterior (Henry's)
2) Dorsal posterior (Thompson's)
3) Ulnar

29

Anterior (Henry's) interval?

1) brachioradialis (radial n)
2) pronator teres or FCR distally (median n)

30

How do you protect the PIN during Henry's approach?

Supination (displaces it ulnarly)

31

Where does the radial artery enter the wrist?

Between brachioradialis and FCR

32

What must you ligate during the Henry's approach?

Leash of Henry (radial artery branches)

33

Risks of Henry's approach?

1) superficial branch of radial n
2) radial artery proximally
3) PIN during deep dissection of proximal exposure

34

Dorsal/posterior (Thompson's) approach interval?

1) ECRB (radial n)
2) extensor digitorum or EPL distally (PIN)

35

Risk during Thompson's approach and how to avoid it?

PIN--avoid excessive retraction of supinator

36

Ulnar approach interval?

1) ECU (PIN)
2) FCU (ulnar n)

37

How do you protect the ulnar a/n during the ulnar approach?

Strip the FCU subperiosteally